History, Future, and Research Activities in Metallurgical Engineering at University of Science and Technology Beijing (USTB)

Zhang, Lifeng

doi:10.1002/srin.201800539

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…A more important factor for scientists and engineers to consider is the technical problems arising in the process of the combination. On the one hand, traditional industrial processes commonly consume multifarious raw materials that makes the mass flows more or less complex and, hence, gives rise to the impossibility of solely relying on a single membrane unit or a simple process [7]. To realize workable solutions, upstream and/or downstream operations with sound design are needed, which requires multidisciplinary coordination and a long lead time.…”

Section: Introductionmentioning

confidence: 99%

Special Issue on “Novel Membrane Technologies for Traditional Industrial Processes”

Jiang

Wang

2019

Processes

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Section: Introductionmentioning

confidence: 99%

Special Issue on “Novel Membrane Technologies for Traditional Industrial Processes”

Jiang

Wang

2019

Processes

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“…PbO2 is commonly used as an anode in metal electrolysis extraction processes [3,4]. As compared with traditional Pb-1% Ag, the traditional PbO2 electrode for non-ferrous metal electrowinning has many advantages, such as higher cathode zinc quality, lower cell voltage and good corrosion resistance in containing-C1solution [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Current Densities on the Microstructure and Electrochemical Behavior of the Porous β-PbO<sub>2</sub> Electrode

Wang

Chen

et al. 2019

MSF

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In order to obtain a titanium-based PbO2 electrode with high electrocatalytic activity and good stability, A porous β-PbO2 electrode is prepared by electrodepositing on titanium substrate Sn-Sb-RuOx coating. The surface morphology and phase analysis of the porous β-PbO2 electrode prepared at different current density were investigated by SEM and XRD. Results showed that the current density changes the surface morphology and active surface area of the porous β-PbO2 electrode. When the current density is 2 A/dm2, the surface of the porous β-PbO2 prepared by electrodeposition has a uniform porous morphology with a pore diameter of 50-200 µm with main crystal phase of β-PbO2. Influence of current density on the electrochemical activity of the electrode was analyzed using anodic polarization curve, electrochemical impedance spectroscopy and galvanostatic polarization. Results revealed that with the increase of current density, the oxygen evolution potential of the porous β-PbO2 electrode decreases first and then increases while the exchange current density first increases and then decreases. When the current density is 2 A/dm2, the oxygen evolution potential is 2.0075 V(at 0.05 A/cm2) and the maximum exchange current density is 1.77×10-4 A/cm2. According to the electrochemical impedance spectroscopy, when the current density is 2 A/dm2, Qf and Qdl are the largest, Rf and Rct are the smallest, and the RF first increases and then decreases with the current density increases. When the current density is 2 A/dm2, the maximum RF value is 655.7. The results with galvanostatic polarization at current density of 0.05 A/cm2 showed that the electrode has a minimum electrode voltage of 2.05 V at a current density of 2 A/dm2. Accelerated life experiments were carried out in 2 g/L Cl- and 150 g/L H2SO4 bath at 25 °C, and the porous β-PbO2 electrode obtained under the current density of 2 A/dm2 has the longest life, and the electrode life is 68 h, which is 2.5 times of the PbO2 electrode obtained under the current density of 4 A/dm2.

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History, Future, and Research Activities in Metallurgical Engineering at University of Science and Technology Beijing (USTB)

Cited by 2 publications

References 35 publications

Special Issue on “Novel Membrane Technologies for Traditional Industrial Processes”

Special Issue on “Novel Membrane Technologies for Traditional Industrial Processes”

Effect of Current Densities on the Microstructure and Electrochemical Behavior of the Porous β-PbO<sub>2</sub> Electrode

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